Table 3.

Growth performance of pigs infected with porcine reproductive and respiratory syndrome (PRRS) virus, porcine epidemic diarrhea (PED) virus, or co-infection

						P-value
Parameter	Control1	PRRS2	PED2	PRP2	SEM	Overall	PRRS3	PED4	Interaction5
0–14 d performance
ADG, kg	0.62a	0.35b	0.61a	0.41b	0.03	<0.001	<0.001	0.506	0.322
ADFI, kg	0.95a	0.67b	0.94a	0.76b	0.05	0.001	<0.001	0.441	0.354
G:F, kg/kg	0.65a	0.53b	0.65a	0.55ab	0.03	0.020	0.003	0.861	0.746
15–21 d performance
ADG, kg	0.66a	0.63a	0.35b	0.20b	0.04	<0.001	0.083	<0.001	0.229
ADFI, kg	1.22a	1.02a	0.88ab	0.67b	0.07	0.003	0.026	<0.001	0.969
G:F, kg/kg	0.54ab	0.62a	0.39bc	0.31c	0.05	0.001	1.000	<0.001	0.133
0–21 d performance
ADG, kg	0.63a	0.44b	0.51ab	0.34c	0.04	<0.001	<0.001	0.001	0.797
ADFI, kg	1.04a	0.78b	0.92ab	0.73b	0.04	0.002	<0.001	0.076	0.508
G:F, kg/kg	0.61a	0.56a	0.56a	0.47b	0.02	0.005	0.006	0.008	0.456

^a–cTreatments with different superscripts differ (P < 0.05).

¹ n = 3 pens per treatment; healthy, virus naïve.

² n = 6 pens per treatment. PRRS = PRRS virus infected; PED = PED virus infected; PRP = PRRS+PED coinfection.

³Main effects of PRRS effect (control and PED vs. PRRS and PRP).

⁴Main effects of PED effect (control and PRRS vs. PED and PRP).

⁵Interaction of PRRS and PED (control and PRP vs. PRRS and PED).